Actually you'd be supporting Zeth who is casting
burning hands (14 dmg). And the damage may be low, but that will kick total fire damage up to 16, which lowers the DC for Russet by 1 more...
Base Save DC for Russet is 15
-4 dc for 16 fire damage total
-2 dc for Aric in bear form helping brace the sled
Total Strength Save DC 9
@domminniti
Wait a minute
@Steve Gorak - you only have one round to prepare, and you're taking 2 Actions - entangle and Wild Shape. For some reason I was remembering Wild Shape as a bonus action, but just double checked and I was wrong. So I'm pretty sure you'd need to choose one or the other?